syzkaller login: [ 41.995393] BUG: Bad rss-counter state mm:00000000e292f227 type:MM_FILEPAGES val:33 [ 41.996451] BUG: Bad rss-counter state mm:00000000e292f227 type:MM_ANONPAGES val:22 [ 42.123519] ================================================================== [ 42.124592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.125695] Read of size 8 at addr ffff88800c4ceb38 by task sshd/218 [ 42.126603] [ 42.126995] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.128030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.129217] Call Trace: [ 42.129465] [ 42.129638] dump_stack_lvl+0x91/0xf0 [ 42.129928] print_report+0xcc/0x620 [ 42.130251] ? __virt_addr_valid+0x102/0x340 [ 42.130604] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.130994] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.131384] kasan_report+0xbe/0xf0 [ 42.131681] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.132067] vma_interval_tree_remove+0xc75/0xec0 [ 42.132448] vma_prepare+0xc54/0x11a0 [ 42.132752] __split_vma+0x5af/0x950 [ 42.133049] ? __pfx___split_vma+0x10/0x10 [ 42.133398] ? find_held_lock+0x2c/0x110 [ 42.133722] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.134079] ? lock_is_held_type+0x9f/0x120 [ 42.134422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.134802] ? mtree_range_walk+0x632/0x900 [ 42.135147] ? mas_walk+0x5c7/0x7c0 [ 42.135438] do_vmi_munmap+0x1f1/0x2b0 [ 42.135748] mmap_region+0x1f9/0x2660 [ 42.136049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.136368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.136819] ? __pfx_lock_acquire+0x10/0x10 [ 42.137161] ? __pfx_mmap_region+0x10/0x10 [ 42.137496] ? security_mmap_addr+0x7d/0xa0 [ 42.137834] ? get_unmapped_area+0x1f5/0x3f0 [ 42.138182] do_mmap+0x854/0xf00 [ 42.138455] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.138768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.139122] ksys_mmap_pgoff+0x3af/0x500 [ 42.139438] do_syscall_64+0x3f/0x90 [ 42.139737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.140135] RIP: 0033:0x7fbdbbef9d82 [ 42.140415] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 42.141746] RSP: 002b:00007ffc9d030c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.142305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbdbbef9d82 [ 42.142836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbdbb333000 [ 42.143373] RBP: 00007fbdbb333000 R08: 0000000000000009 R09: 0000000000001000 [ 42.143896] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625971e4b20 [ 42.144432] R13: 00007ffc9d030c90 R14: 00007ffc9d030cc0 R15: 00007ffc9d031020 [ 42.144972] [ 42.145165] [ 42.145297] Allocated by task 211: [ 42.145565] kasan_save_stack+0x22/0x50 [ 42.145891] kasan_set_track+0x25/0x30 [ 42.146202] __kasan_slab_alloc+0x59/0x70 [ 42.146515] kmem_cache_alloc+0x16b/0x370 [ 42.146840] vm_area_dup+0x20/0x160 [ 42.147131] __split_vma+0x170/0x950 [ 42.147429] split_vma+0xc6/0x110 [ 42.147688] mprotect_fixup+0x8d2/0xb30 [ 42.147988] do_mprotect_pkey+0x87e/0xd40 [ 42.148305] __x64_sys_mprotect+0x78/0xc0 [ 42.148625] do_syscall_64+0x3f/0x90 [ 42.148909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.149306] [ 42.149437] Freed by task 211: [ 42.149673] kasan_save_stack+0x22/0x50 [ 42.149973] kasan_set_track+0x25/0x30 [ 42.150270] kasan_save_free_info+0x2b/0x50 [ 42.150599] __kasan_slab_free+0x10a/0x190 [ 42.150915] kmem_cache_free+0x10d/0x4d0 [ 42.151218] rcu_core+0x8c8/0x2860 [ 42.151484] __do_softirq+0x1b7/0x7d4 [ 42.151769] [ 42.151901] Last potentially related work creation: [ 42.152245] kasan_save_stack+0x22/0x50 [ 42.152548] __kasan_record_aux_stack+0x8e/0xa0 [ 42.152891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.153282] remove_vma+0x139/0x170 [ 42.153548] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.153877] do_vmi_munmap+0x1f1/0x2b0 [ 42.154161] __vm_munmap+0x138/0x3a0 [ 42.154443] __x64_sys_munmap+0x59/0x80 [ 42.154757] do_syscall_64+0x3f/0x90 [ 42.155052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.155461] [ 42.155596] The buggy address belongs to the object at ffff88800c4ceae0 [ 42.155596] which belongs to the cache vm_area_struct of size 168 [ 42.156533] The buggy address is located 88 bytes inside of [ 42.156533] freed 168-byte region [ffff88800c4ceae0, ffff88800c4ceb88) [ 42.157439] [ 42.157569] The buggy address belongs to the physical page: [ 42.157984] page:000000006b97c805 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4ce [ 42.158669] memcg:ffff88800f0e7201 [ 42.158936] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.159381] page_type: 0xffffffff() [ 42.159665] raw: 0100000000000200 ffff88800879fc80 ffffea0000241500 dead000000000005 [ 42.160230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0e7201 [ 42.160800] page dumped because: kasan: bad access detected [ 42.161223] [ 42.161363] Memory state around the buggy address: [ 42.161729] ffff88800c4cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.162257] ffff88800c4cea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 42.162804] >ffff88800c4ceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.163329] ^ [ 42.163715] ffff88800c4ceb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.164259] ffff88800c4cec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.164799] ================================================================== [ 42.165410] Disabling lock debugging due to kernel taint [ 44.232851] BUG: Bad rss-counter state mm:000000004f748c87 type:MM_FILEPAGES val:33 [ 44.233883] BUG: Bad rss-counter state mm:000000004f748c87 type:MM_ANONPAGES val:22 [ 44.588119] BUG: Bad rss-counter state mm:000000009e361d58 type:MM_FILEPAGES val:33 [ 44.589219] BUG: Bad rss-counter state mm:000000009e361d58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40377' (ECDSA) to the list of known hosts. 2023/06/19 11:43:02 fuzzer started 2023/06/19 11:43:02 dialing manager at localhost:44161 2023/06/19 11:43:02 checking machine... 2023/06/19 11:43:02 checking revisions... [ 45.291309] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:43:02 testing simple program... [ 45.336124] cgroup: Unknown subsys name 'net' [ 45.394332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff813c9176 RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88806ce2c2b0 RSP=ffffffff85407d88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c58000 R12=ffff88806ce2c2b8 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c07e4 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff1374ae650 CR3=000000000e962000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031303a33343a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8369c6be RBX=ffff888019f92000 RCX=ffffffff812e00e5 RDX=1ffff110033f243c RSI=0000000000000004 RDI=ffff88800fd57888 RBP=ffff888019f921d0 RSP=ffff88800fd57900 R8 =0000000000000001 R9 =ffffed1001faaf11 R10=0000000000000003 R11=0000000000000000 R12=0000000000000293 R13=ffff88800fd57a48 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff8452fd43 RFL=00000082 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff136ef9900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe1b445000 CR3=0000000016a66000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000